Unit 7, Lesson 3
Count On or Count Back to Subtract
Grade 2
Activity 1
Jump Back, Back, Back
Jada and Andre find the value of
Jada’s work
Andre’s work
What do you notice? What do you wonder?
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Try Andre’s way. Find the value of
Use a number line if it helps.
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Find the value of
Use a number line if it helps.
Activity 2
Who Spilled Paint?
Oh no! Diego spilled paint on his paper. He can’t see all the numbers.
Find the number that makes each equation true.
5 splatter equations. 250 plus splatter equals 1000. 600 minus 440 equals splatter. 680 plus splatter equals 900. Splatter plus 590 equals 1000. 900 minus 370 equals splatter.
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